EP0359713B1 - Pied presseur pour coudre et couper - Google Patents

Pied presseur pour coudre et couper Download PDF

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Publication number
EP0359713B1
EP0359713B1 EP89810672A EP89810672A EP0359713B1 EP 0359713 B1 EP0359713 B1 EP 0359713B1 EP 89810672 A EP89810672 A EP 89810672A EP 89810672 A EP89810672 A EP 89810672A EP 0359713 B1 EP0359713 B1 EP 0359713B1
Authority
EP
European Patent Office
Prior art keywords
foot
cutting
rocking lever
needle
stitching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89810672A
Other languages
German (de)
English (en)
Other versions
EP0359713A1 (fr
Inventor
Stephan Marbacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0359713A1 publication Critical patent/EP0359713A1/fr
Application granted granted Critical
Publication of EP0359713B1 publication Critical patent/EP0359713B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
    • D05B37/04—Cutting devices
    • D05B37/06—Cutting devices with oscillating tools

Definitions

  • the invention relates to a sewing cutting foot that can be interchangeably attached to a sewing machine. With the help of such a foot, the sewing machine can sew a seam in one operation and cut off the fabric next to the seam.
  • Such a sewing cutting foot has become known from Swiss Patent 541,650.
  • the scissors connected to the foot are actuated by the up and down movement of the needle bar.
  • the scissors cut a small cutting distance in the direction of the fabric feed before the injection point.
  • the cutting length must be short enough so that the cut can also follow a curve.
  • the cutting length must be greater than the largest possible stitch length of the machine.
  • the stroke of the needle bar is much larger than the required stroke on movable leg of the scissors.
  • the old DE-C-34 202 patent published in 1886 proposes to fix a wedge on the needle bar on which a roll of it rests at least approximately on the arm of an angular pivoting lever which protrudes towards the sewing support surface, thereby increasing the stroke for the cutting device to reduce.
  • all parts are firmly connected to the sewing machine and not to a replaceable sewing machine foot.
  • FIG. 1 shows the lever mechanism according to CH-PS 541 650 in simplified form.
  • the needle fastening screw B engages in a longitudinal slot of the lever a, which is pivotable about an X-axis firmly connected to the foot F.
  • a bolt a 1 of the lever a engages in a slot of the second lever b, which is pivotable about the axis Y firmly connected to the foot F.
  • the axis y is also the pivot axis of the movable scissor arm S.
  • a about T-shaped pivot lever is pivotable about the axis X 1 firmly connected to the foot.
  • a bolt connected to the lever c 1 engages in a slot of the movable scissor cutting leg 5. This can be pivoted about the axis Y, which is firmly connected to the foot.
  • a flank of the protruding arm of the lever C includes a small angle ⁇ to the path of movement of the needle bar or to the path of movement of the needle fastening screw B, the pivoting movement of the lever C is slight and no further reduction is required.
  • a spring is attached so that the flank of the swivel lever always lies against screw B.
  • 3-5 shows an embodiment of a sewing cutting foot on a larger scale.
  • the foot 10 is resiliently pivotably connected to the holder 12 of the foot guide rod 13 at 11. This is shown here by broken lines, since it is not part of the invention.
  • On one side of the foot there is a bearing bar 14 (see FIG.
  • the T-shaped pivot lever 20 is pivotable about the axis 21 fastened in the bar 14.
  • a spacer ring 22 and a nut 23 screwed onto the axle 21 provide guidance for the lever 20.
  • one arm of the lever is bent in a U-shape. This U protects against unintentional touching of the scissors.
  • the protruding arm of the T-shaped lever has a flank 25 which is in contact with the needle fastening screw 50 during operation. In other words, the screw 50 slides up and down on the flank 25 during operation and thereby causes a pivoting movement of the T-shaped lever.
  • the needle bar 51 is shown by broken lines since it is not part of the invention.
  • a spiral spring 30 is provided so that the flank 25 is always in contact with the screw B.
  • a vertically bent end of the spring engages in a bore 31 in the strip 14.
  • the spring wraps around the nut 23 and its other end engages under the front arm of the T-shaped lever. So that the T-shaped lever can actuate the movable leg 40 of the scissors, it is connected to a pin 41, which engages in a slot 42 of the leg 40.
  • the pin 41 forms part of a screw 43 and is mounted eccentrically to this. This results in an adjustment possibility of the stroke of the scissor leg 40. With the help of the nut 44, the selected setting can be fixed.
  • the scissor leg 40 is pivotable about the axis 45.
  • a spring 46 ensures a tight fit against the fixed scissor leg 47 and a nut 48 allows the contact pressure to be set.
  • the fixed scissor leg is shown in FIG. 5a for itself.
  • the towering part 47 ' is held in a groove in the bar 14. Both cutting legs are therefore easy to replace.
  • the flank 25 of the T-shaped lever arm is shown straight. This means that the cutting movement of the scissors takes place during the entire stroke of the needle bar.
  • the flank 25 can also be slightly curved. This allows the cutting movement to be moved to either the start or the end of the plunge movement.
  • Figures 6-9 show what can be done with the sewing cutting foot using a modern sewing machine.
  • Figure 6 shows a straight seam next to which the fabric is cut off at a distance X. The direction of advance or retraction is indicated by an arrow.
  • FIG. 7 shows an overlock or confirmation seam, the zigzag pivoting movement of the needle bar being switched on.
  • Figure 8 shows a hemstitch in which only the upper layer of fabric is cut off and Figure 9 shows the same hemstitch from the side.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (5)

  1. Pied-de-biche pour coudre et pour couper, lequel peut être monté de manière interchangeable sur une machine à coudre et comprend des ciseaux qui peuvent être actionnés par un déplacement vers le haut et vers le bas de la barre à aiguille et dont une lame est mobile au moyen d'un levier pivotant comportant un bras, celui-ci s'étendant vers le haut, perpendiculairement à la surface d'appui de la pièce à coudre, du moins approximativement, et comportant un flanc latéral qui forme un angle aigu avec la trajectoire de la barre à aiguille et qui porte, lors du fonctionnement, sur la vis de fixation de l'aiguille sous la pression d'un ressort, caractérisé par le fait que l'axe de pivotement (45) de la lame des ciseaux est situé devant le point de piqûre de l'aiguille en étant décalé latéralement dans la région du pied-de-biche, tandis que l'axe de pivotement (21) du levier pivotant (20) est situé dans la région de la tige de pression (13) du pied-de-biche, derrière le point de piqûre de l'aiguille et en étant décalé latéralement, et par le fait qu'est monté un ressort de flexion (30) qui entoure l'axe de pivotement (21) du levier pivotant (20) et dont une extrémité (31) est reliée à une partie fixe (14) du pied-de-biche (10), tandis que son autre extrémité (32) est reliée au levier pivotant (20).
  2. Pied-de-biche selon la revendication 1, caractérisé par le fait que la lame mobile (40) des ciseaux comporte une fente (42) dans laquelle pénètre un téton (41) relié au levier pivotant (20).
  3. Pied-de-biche selon la revendication 2, caractérisé par le fait que le téton (41) est monté d'une manière excentrée sur une partie (43, 44) qui peut tourner dans le levier pivotant et y être fixée.
  4. Pied-de-biche selon la revendication 1, caractérisé par le fait que le flanc (25) du levier pivotant (20) qui porte sur la vis de fixation (50) de l'aiguille lors du fonctionnement est droite.
  5. Pied-de-biche selon la revendication 1, caractérisé par le fait que le flanc (25) du levier pivotant (20) qui porte sur la vis de fixation (B) de l'aiguille lors du fonctionnement est courbe le long d'une partie de sa longueur.
EP89810672A 1988-09-13 1989-09-11 Pied presseur pour coudre et couper Expired - Lifetime EP0359713B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3411/88A CH679409A5 (fr) 1988-09-13 1988-09-13
CH3411/88 1988-09-13

Publications (2)

Publication Number Publication Date
EP0359713A1 EP0359713A1 (fr) 1990-03-21
EP0359713B1 true EP0359713B1 (fr) 1993-02-03

Family

ID=4255405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810672A Expired - Lifetime EP0359713B1 (fr) 1988-09-13 1989-09-11 Pied presseur pour coudre et couper

Country Status (5)

Country Link
US (1) US5000104A (fr)
EP (1) EP0359713B1 (fr)
JP (1) JPH02114989A (fr)
CH (1) CH679409A5 (fr)
DE (1) DE58903442D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4750954B2 (ja) 2000-02-29 2011-08-17 Ｊｕｋｉ株式会社 サイクルミシン
ITMI20012622A1 (it) * 2001-12-12 2003-06-12 Saltek Engineering S R L Macchina per l'applicazione a caldo di nastri o filò rigidi e/o elastici su supporti tessili e non

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34202C (de) * J. GUTMANN in Berlin Messerbewegung für Nähmaschinen
US322326A (en) * 1885-07-14 Geoeg schoen
US202908A (en) * 1878-04-23 Improvement in trimmers for sewing-machines
US801980A (en) * 1905-02-08 1905-10-17 Virginia Whitehead Glover Trimmer for sewing-machines.
US947506A (en) * 1909-06-14 1910-01-25 Isidor Weinbach Combination pressure-foot and trimming attachment for sewing-machines.
US1727850A (en) * 1926-07-24 1929-09-10 Crystal Springs Bleachery Co Trimming mechanism
FR1073215A (fr) * 1953-03-24 1954-09-21 Perfectionnement aux machines à coudre
CH541650A (de) * 1971-08-27 1973-09-15 Marbacher Stephan Zusatzvorrichtung an Nähmaschinen zum Schneiden von Stoff, Leder, Kunstleder, Plastikfolie etc.

Also Published As

Publication number Publication date
JPH02114989A (ja) 1990-04-27
CH679409A5 (fr) 1992-02-14
DE58903442D1 (de) 1993-03-18
EP0359713A1 (fr) 1990-03-21
US5000104A (en) 1991-03-19

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